51" Donaldson Muffler: 4" or 5"?

[sid325]

Well, I just replaced my MBRP 5" muffler with the Donaldson 51" M090535 and love it. The sound is great. It still had a rumble, but quieter, cleaner. If you're thinking about a 5" it's a great muffler.



sid

 

[TWenske]

I have also run a 51" Donaldson on a 06 Mega, 5" turbo back with a 6" tip and no cat. I started with a 5" ebay exhaust with the ebay muffler and the noise was crazy bad at highway speeds. Tried a little shorty resonator in front of the muffler and it did not help at all. Bought the 51" and was happy as could be.